The Big Bang Theory actress showed off her edgy pink pixie on Instagram, with the caption: "Have wanted to do this for years! Finally went pretty in pink!"

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Christina Aguilera

Bye, bye extensions! The Voice judge debuted a cute, wavy lob at a press event for the show.

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Hilary Duff

After rocking pink strands just a few weeks, Hilary just debuted a trendy grey 'do that's leaving us with serious hair envy.

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Colton Haynes

The Arrow star showed off his edgy shaved head while on vacay in Versailles. We didn't know it was possible, but he looks even hotter!

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Splash; Instagram.com/hilaryduff

Hilary Duff

Hilary showed off amazing pink and grey strands on the set of the music video for her hit song, "Sparks."

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Sarah Hyland

Our May cover girl is switching up her hair again! Most recently she debuted a bob, and now she's added some teal highlights for Coachella.

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Jourdan Dunn

The Victoria's Secret model hit Coachella with major purple hair! She was also seen with grey strands the next day, so basically Jourdan IS music festival hair goals.

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Rihanna

The style chameleon showed off gorge red strands at Coachella this weekend.

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Michael Clifford

The 5SOS cutie totally surprised fans when he got in on Hollywood's current obsession with pastel hair, showing off his latest hair color on Twitter with the caption: "changed my hair. looks like something blue exploded on my head." It kinda does, Michael, and we love it!

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Kylie Jenner

Was Kylie getting jealous that Hilary Duff was having all the fun? She debuted her bright greenish blue hair on Instagram with the caption: "the road trip begins.."

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Noah Cyrus

We saw sneak peaks of Noah's amazing purple hair, but now she's showing it off in all its glory. With the combined shades of blue and green, it's even cooler than we thought!

The Fifth Harmony singer debuted her hot blonde hair on Instagram, with the caption: "Like I care" We do care, and we love it.

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Liam Hemsworth

Is Liam vying for Zayn's 1D spot? The mushroom top hairstyle he was sporting at the Kids' Choice Awards is a bit more boy band than Hollywood Hunk. Either way, he still looks super hot!

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Debby Ryan

Bye, bye blonde! The Jessie star switched it up again with gorge lavender locks!

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Rihanna

We're in love with Ri's fresh spring bangs, which just draw more attention to her gorge features.

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Kim Kardashian

After blowing up the Internet with her blonde Malfoy-inspired 'do, Kim was seen out and about with her adorbs daughter North, rocking her natural dark brown hair.

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Sarah Hyland

After taking out her super-long extensions, Sarah went even shorter, getting a fresh spring bob.

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Idina Menzel

The Broadway vet and voice of Frozen's Elsa is slowly turning into the Ice Queen IRL! Idina debuted her new blonde strands on Twitter, with the caption: "Needed a change. Loving it! #brunettetoblonde #blondehairdontcare"

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Lena Dunham

The Girls star debuted her cute pixie on Late Night, and we're officially obsessed.

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Hilary Duff

Hilary is totally pulling a Kylie Jenner with her blue-green hair, and we're loving it!

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Ellie Goulding

Ellie joins the lob club! The singer showed off her adorable new cut at a fashion dinner in London.

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Sarah Hyland

The Modern Family star hit up Paley Fest rocking a cute, new short 'do.

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Vanessa Hudgens

The actress took out her red extensions and chopped her hair into a trendy bob. She posted the chic cut to Instagram with the caption: "Who needs a lob when you can have a bb (blunt bob)!! "

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Debby Ryan

It's back! After some time rocking her natural red hair, Debby is trying trendy platinum again.

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Kylie Jenner

Kylie loves to change up her hair with extensions, but it's such a chic, bold look when she removes them to reveal a bob!

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Kim Kardashian

The reality star has been golden-blonde before, but now she's gone platinum!

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Carly Rae Jepsen

The "I Really Like You" singer went with a shorter and more red 'do, just in time to promote her exciting, new music.

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Sasha Pieterse

The PLL star ditched her blonde hair for darker locks, sharing her new 'do on Insta. Could the new look mean Ali's going undercover?!